ndp.c revision 61026 
1/*
2 * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the project nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: head/usr.sbin/ndp/ndp.c 61026 2000-05-28 15:04:01Z charnier $
30 */
31/*
32 * Copyright (c) 1984, 1993
33 *	The Regents of the University of California.  All rights reserved.
34 *
35 * This code is derived from software contributed to Berkeley by
36 * Sun Microsystems, Inc.
37 *
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
40 * are met:
41 * 1. Redistributions of source code must retain the above copyright
42 *    notice, this list of conditions and the following disclaimer.
43 * 2. Redistributions in binary form must reproduce the above copyright
44 *    notice, this list of conditions and the following disclaimer in the
45 *    documentation and/or other materials provided with the distribution.
46 * 3. All advertising materials mentioning features or use of this software
47 *    must display the following acknowledgement:
48 *	This product includes software developed by the University of
49 *	California, Berkeley and its contributors.
50 * 4. Neither the name of the University nor the names of its contributors
51 *    may be used to endorse or promote products derived from this software
52 *    without specific prior written permission.
53 *
54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
57 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
64 * SUCH DAMAGE.
65 */
66
67/*
68 * Based on:
69 * "@(#) Copyright (c) 1984, 1993\n\
70 *	The Regents of the University of California.  All rights reserved.\n";
71 *
72 * "@(#)arp.c	8.2 (Berkeley) 1/2/94";
73 */
74
75/*
76 * ndp - display, set, delete and flush neighbor cache
77 */
78
79
80#include <sys/param.h>
81#include <sys/file.h>
82#include <sys/ioctl.h>
83#include <sys/socket.h>
84#include <sys/sysctl.h>
85#include <sys/time.h>
86
87#include <net/if.h>
88#include <net/if_var.h>
89#include <net/if_dl.h>
90#include <net/if_types.h>
91#include <net/route.h>
92
93#include <netinet/in.h>
94#include <netinet/if_ether.h>
95
96#include <netinet/icmp6.h>
97#include <netinet6/in6_var.h>
98#include <netinet6/nd6.h>
99
100#include <arpa/inet.h>
101
102#include <netdb.h>
103#include <errno.h>
104#include <nlist.h>
105#include <stdio.h>
106#include <string.h>
107#include <paths.h>
108#include <err.h>
109#include <stdlib.h>
110#include <fcntl.h>
111#include <unistd.h>
112#include "gmt2local.h"
113
114/* packing rule for routing socket */
115#define	ROUNDUP(a) \
116	((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
117#define	ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
118
119extern int	 errno;
120static int	pid;
121static int	fflag;
122static int	nflag;
123static int	tflag;
124static int32_t	thiszone;	/* time difference with gmt */
125static int	s = -1;
126static int	repeat = 0;
127static int	lflag = 0;
128
129char	ntop_buf[INET6_ADDRSTRLEN];	/* inet_ntop() */
130char	host_buf[NI_MAXHOST];		/* getnameinfo() */
131char	ifix_buf[IFNAMSIZ];		/* if_indextoname() */
132
133int	main __P((int, char **));
134int	file __P((char *));
135void	getsocket __P((void));
136int	set __P((int, char **));
137void	get __P((char *));
138int	delete __P((char *));
139void	dump __P((struct in6_addr *));
140static struct	in6_nbrinfo *getnbrinfo __P((struct in6_addr *addr, int ifindex));
141static char	*ether_str __P((struct sockaddr_dl *));
142int	ndp_ether_aton __P((char *, u_char *));
143void	usage __P((void));
144int	rtmsg __P((int));
145void	ifinfo __P((char *));
146void	list __P((void));
147void	plist __P((void));
148void	pfx_flush __P((void));
149void	rtrlist __P((void));
150void	rtr_flush __P((void));
151void	harmonize_rtr __P((void));
152static char	*sec2str __P((time_t t));
153static char	*ether_str __P((struct sockaddr_dl *sdl));
154static void	ts_print __P((const struct timeval *));
155
156int
157main(argc, argv)
158	int argc;
159	char **argv;
160{
161	int ch;
162	int aflag = 0, cflag = 0, dflag = 0, sflag = 0, Hflag = 0,
163		pflag = 0, rflag = 0, Pflag = 0, Rflag = 0;
164	extern char *optarg;
165	extern int optind;
166
167	pid = getpid();
168	thiszone = gmt2local(0);
169	while ((ch = getopt(argc, argv, "acndfilprstA:HPR")) != EOF)
170		switch ((char)ch) {
171		case 'a':
172			aflag = 1;
173			break;
174		case 'c':
175			fflag = 1;
176			cflag = 1;
177			break;
178		case 'd':
179			dflag = 1;
180			break;
181		case 'i' :
182			if (argc != 3)
183				usage();
184			ifinfo(argv[2]);
185			exit(0);
186		case 'n':
187			nflag = 1;
188			continue;
189		case 'p':
190			pflag = 1;
191			break;
192		case 'f' :
193			if (argc != 3)
194				usage();
195			file(argv[2]);
196			exit(0);
197		case 'l' :
198			lflag = 1;
199			break;
200		case 'r' :
201			rflag = 1;
202			break;
203		case 's':
204			sflag = 1;
205			break;
206		case 't':
207			tflag = 1;
208			break;
209		case 'A':
210			aflag = 1;
211			repeat = atoi(optarg);
212			if (repeat < 0)
213				usage();
214			break;
215		case 'H' :
216			Hflag = 1;
217			break;
218		case 'P':
219			Pflag = 1;
220			break;
221		case 'R':
222			Rflag = 1;
223			break;
224		default:
225			usage();
226		}
227
228	argc -= optind;
229	argv += optind;
230
231	if (aflag || cflag) {
232		dump(0);
233		exit(0);
234	}
235	if (dflag) {
236		if (argc != 1)
237			usage();
238		delete(argv[0]);
239	}
240	if (pflag) {
241		plist();
242		exit(0);
243	}
244	if (rflag) {
245		rtrlist();
246		exit(0);
247	}
248	if (sflag) {
249		if (argc < 2 || argc > 4)
250			usage();
251		exit(set(argc, argv) ? 1 : 0);
252	}
253	if (Hflag) {
254		harmonize_rtr();
255		exit(0);
256	}
257	if (Pflag) {
258		pfx_flush();
259		exit(0);
260	}
261	if (Rflag) {
262		rtr_flush();
263		exit(0);
264	}
265
266	if (argc != 1)
267		usage();
268	get(argv[0]);
269	exit(0);
270}
271
272/*
273 * Process a file to set standard ndp entries
274 */
275int
276file(name)
277	char *name;
278{
279	FILE *fp;
280	int i, retval;
281	char line[100], arg[5][50], *args[5];
282
283	if ((fp = fopen(name, "r")) == NULL) {
284		fprintf(stderr, "ndp: cannot open %s\n", name);
285		exit(1);
286	}
287	args[0] = &arg[0][0];
288	args[1] = &arg[1][0];
289	args[2] = &arg[2][0];
290	args[3] = &arg[3][0];
291	args[4] = &arg[4][0];
292	retval = 0;
293	while(fgets(line, 100, fp) != NULL) {
294		i = sscanf(line, "%s %s %s %s %s", arg[0], arg[1], arg[2],
295		    arg[3], arg[4]);
296		if (i < 2) {
297			fprintf(stderr, "ndp: bad line: %s\n", line);
298			retval = 1;
299			continue;
300		}
301		if (set(i, args))
302			retval = 1;
303	}
304	fclose(fp);
305	return (retval);
306}
307
308void
309getsocket()
310{
311	if (s < 0) {
312		s = socket(PF_ROUTE, SOCK_RAW, 0);
313		if (s < 0) {
314			perror("ndp: socket");
315			exit(1);
316		}
317	}
318}
319
320struct	sockaddr_in so_mask = {8, 0, 0, { 0xffffffff}};
321struct	sockaddr_in6 blank_sin = {sizeof(blank_sin), AF_INET6 }, sin_m;
322struct	sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m;
323int	expire_time, flags, found_entry;
324struct	{
325	struct	rt_msghdr m_rtm;
326	char	m_space[512];
327}	m_rtmsg;
328
329/*
330 * Set an individual neighbor cache entry
331 */
332int
333set(argc, argv)
334	int argc;
335	char **argv;
336{
337	register struct sockaddr_in6 *sin = &sin_m;
338	register struct sockaddr_dl *sdl;
339	register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
340	struct addrinfo hints, *res;
341	int gai_error;
342	u_char *ea;
343	char *host = argv[0], *eaddr = argv[1];
344
345	getsocket();
346	argc -= 2;
347	argv += 2;
348	sdl_m = blank_sdl;
349	sin_m = blank_sin;
350
351	bzero(&hints, sizeof(hints));
352	hints.ai_family = AF_INET6;
353	gai_error = getaddrinfo(host, NULL, &hints, &res);
354	if (gai_error) {
355		fprintf(stderr, "ndp: %s: %s\n", host,
356			gai_strerror(gai_error));
357		return 1;
358	}
359	sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
360	ea = (u_char *)LLADDR(&sdl_m);
361	if (ndp_ether_aton(eaddr, ea) == 0)
362		sdl_m.sdl_alen = 6;
363	flags = expire_time = 0;
364	while (argc-- > 0) {
365		if (strncmp(argv[0], "temp", 4) == 0) {
366			struct timeval time;
367			gettimeofday(&time, 0);
368			expire_time = time.tv_sec + 20 * 60;
369		}
370		argv++;
371	}
372tryagain:
373	if (rtmsg(RTM_GET) < 0) {
374		perror(host);
375		return (1);
376	}
377	sin = (struct sockaddr_in6 *)(rtm + 1);
378	sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
379	if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
380		if (sdl->sdl_family == AF_LINK &&
381		    (rtm->rtm_flags & RTF_LLINFO) &&
382		    !(rtm->rtm_flags & RTF_GATEWAY)) switch (sdl->sdl_type) {
383		case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
384		case IFT_ISO88024: case IFT_ISO88025:
385			goto overwrite;
386		}
387		goto tryagain;
388	}
389overwrite:
390	if (sdl->sdl_family != AF_LINK) {
391		printf("cannot intuit interface index and type for %s\n", host);
392		return (1);
393	}
394	sdl_m.sdl_type = sdl->sdl_type;
395	sdl_m.sdl_index = sdl->sdl_index;
396	return (rtmsg(RTM_ADD));
397}
398
399/*
400 * Display an individual neighbor cache entry
401 */
402void
403get(host)
404	char *host;
405{
406	struct sockaddr_in6 *sin = &sin_m;
407	struct addrinfo hints, *res;
408	int gai_error;
409
410	sin_m = blank_sin;
411	bzero(&hints, sizeof(hints));
412	hints.ai_family = AF_INET6;
413	gai_error = getaddrinfo(host, NULL, &hints, &res);
414	if (gai_error) {
415		fprintf(stderr, "ndp: %s: %s\n", host,
416			gai_strerror(gai_error));
417		return;
418	}
419	sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
420	dump(&sin->sin6_addr);
421	if (found_entry == 0) {
422		getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
423			    sizeof(host_buf), NULL ,0,
424			    NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
425		printf("%s (%s) -- no entry\n", host, host_buf);
426		exit(1);
427	}
428}
429
430/*
431 * Delete a neighbor cache entry
432 */
433int
434delete(host)
435	char *host;
436{
437	struct sockaddr_in6 *sin = &sin_m;
438	register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
439	struct sockaddr_dl *sdl;
440	struct addrinfo hints, *res;
441	int gai_error;
442
443	getsocket();
444	sin_m = blank_sin;
445
446	bzero(&hints, sizeof(hints));
447	hints.ai_family = AF_INET6;
448	gai_error = getaddrinfo(host, NULL, &hints, &res);
449	if (gai_error) {
450		fprintf(stderr, "ndp: %s: %s\n", host,
451			gai_strerror(gai_error));
452		return 1;
453	}
454	sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
455/*tryagain:*/
456	if (rtmsg(RTM_GET) < 0) {
457		perror(host);
458		return (1);
459	}
460	sin = (struct sockaddr_in6 *)(rtm + 1);
461	sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
462	if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
463		if (sdl->sdl_family == AF_LINK &&
464		    (rtm->rtm_flags & RTF_LLINFO) &&
465		    !(rtm->rtm_flags & RTF_GATEWAY)) switch (sdl->sdl_type) {
466		case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
467		case IFT_ISO88024: case IFT_ISO88025:
468			goto delete;
469		}
470	}
471	return 0;
472delete:
473	if (sdl->sdl_family != AF_LINK) {
474		printf("cannot locate %s\n", host);
475		return (1);
476	}
477	if (rtmsg(RTM_DELETE) == 0) {
478	       getnameinfo((struct sockaddr *)sin,
479			   sin->sin6_len, host_buf,
480			   sizeof(host_buf), NULL, 0,
481			   NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
482		printf("%s (%s) deleted\n", host, host_buf);
483	}
484
485	return 0;
486}
487
488/*
489 * Dump the entire neighbor cache
490 */
491void
492dump(addr)
493	struct in6_addr *addr;
494{
495	int mib[6];
496	size_t needed;
497	char *host, *lim, *buf, *next;
498	struct rt_msghdr *rtm;
499	struct sockaddr_in6 *sin;
500	struct sockaddr_dl *sdl;
501	extern int h_errno;
502	struct hostent *hp;
503	struct in6_nbrinfo *nbi;
504	struct timeval time;
505	int addrwidth;
506
507	/* Print header */
508	if (!tflag)
509		printf("%-29.29s %-18.18s %6.6s %-9.9s %2s %4s %4s\n",
510		       "Neighbor", "Linklayer Address", "Netif", "Expire",
511		       "St", "Flgs", "Prbs");
512
513again:;
514	mib[0] = CTL_NET;
515	mib[1] = PF_ROUTE;
516	mib[2] = 0;
517	mib[3] = AF_INET6;
518	mib[4] = NET_RT_FLAGS;
519	mib[5] = RTF_LLINFO;
520	if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
521		err(1, "sysctl(PF_ROUTE estimate)");
522	if (needed > 0) {
523		if ((buf = malloc(needed)) == NULL)
524			errx(1, "malloc");
525		if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
526			err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)");
527		lim = buf + needed;
528	} else
529		buf = lim = NULL;
530
531	for (next = buf; next && next < lim; next += rtm->rtm_msglen) {
532		int isrouter = 0, prbs = 0;
533
534		rtm = (struct rt_msghdr *)next;
535		sin = (struct sockaddr_in6 *)(rtm + 1);
536		sdl = (struct sockaddr_dl *)((char *)sin + ROUNDUP(sin->sin6_len));
537		if (addr) {
538			if (!IN6_ARE_ADDR_EQUAL(addr, &sin->sin6_addr))
539				continue;
540			found_entry = 1;
541		} else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr))
542			continue;
543		if (fflag == 1) {
544			delete((char *)inet_ntop(AF_INET6, &sin->sin6_addr,
545						 ntop_buf, sizeof(ntop_buf)));
546			continue;
547		}
548
549		if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) ||
550		    IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) {
551			/* XXX: should scope id be filled in the kernel? */
552			if (sin->sin6_scope_id == 0)
553				sin->sin6_scope_id = sdl->sdl_index;
554
555			/* XXX: KAME specific hack; removed the embedded id */
556			*(u_int16_t *)&sin->sin6_addr.s6_addr[2] = 0;
557		}
558		getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
559			    sizeof(host_buf), NULL, 0,
560			    NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
561		gettimeofday(&time, 0);
562		if (tflag)
563			ts_print(&time);
564
565		if (lflag) {
566			addrwidth = strlen(host_buf);
567			if (addrwidth < 29)
568				addrwidth = 29;
569		} else
570			addrwidth = 29;
571
572		printf("%-*.*s %-18.18s %6.6s", addrwidth, addrwidth, host_buf,
573		       ether_str(sdl),
574		       if_indextoname(sdl->sdl_index, ifix_buf));
575
576		/* Print neighbor discovery specific informations */
577		putchar(' ');
578		nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index);
579		if (nbi) {
580			if (nbi->expire > time.tv_sec) {
581				printf(" %-9.9s",
582				       sec2str(nbi->expire - time.tv_sec));
583			}
584			else if (nbi->expire == 0)
585				printf(" %-9.9s", "permanent");
586			else
587				printf(" %-9.9s", "expired");
588
589			switch(nbi->state) {
590			 case ND6_LLINFO_NOSTATE:
591				 printf(" N");
592				 break;
593			 case ND6_LLINFO_WAITDELETE:
594				 printf(" W");
595				 break;
596			 case ND6_LLINFO_INCOMPLETE:
597				 printf(" I");
598				 break;
599			 case ND6_LLINFO_REACHABLE:
600				 printf(" R");
601				 break;
602			 case ND6_LLINFO_STALE:
603				 printf(" S");
604				 break;
605			 case ND6_LLINFO_DELAY:
606				 printf(" D");
607				 break;
608			 case ND6_LLINFO_PROBE:
609				 printf(" P");
610				 break;
611			 default:
612				 printf(" ?");
613				 break;
614			}
615
616			isrouter = nbi->isrouter;
617			prbs = nbi->asked;
618		}
619		else {
620			warnx("failed to get neighbor information");
621			printf("  ");
622		}
623
624		/* other flags */
625		putchar(' ');
626		{
627			u_char flgbuf[8], *p = flgbuf;
628
629			flgbuf[0] = '\0';
630			if (isrouter)
631				p += sprintf((char *)p, "R");
632#ifndef RADISH
633			if (rtm->rtm_addrs & RTA_NETMASK) {
634				sin = (struct sockaddr_in6 *)
635					(sdl->sdl_len + (char *)sdl);
636				if (!IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr))
637					p += sprintf((char *)p, "P");
638				if (sin->sin6_len != sizeof(struct sockaddr_in6))
639					p += sprintf((char *)p, "W");
640			}
641#endif /*RADISH*/
642			printf("%4s", flgbuf);
643		}
644
645		putchar(' ');
646		if (prbs)
647			printf("% 4d", prbs);
648
649		printf("\n");
650	}
651
652	if (repeat) {
653		printf("\n");
654		sleep(repeat);
655		goto again;
656	}
657}
658
659static struct in6_nbrinfo *
660getnbrinfo(addr, ifindex)
661	struct in6_addr *addr;
662	int ifindex;
663{
664	static struct in6_nbrinfo nbi;
665	int s;
666
667	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
668		err(1, "socket");
669
670	bzero(&nbi, sizeof(nbi));
671	if_indextoname(ifindex, nbi.ifname);
672	nbi.addr = *addr;
673	if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) {
674		warn("ioctl");
675		close(s);
676		return(NULL);
677	}
678
679	close(s);
680	return(&nbi);
681}
682
683static char *
684ether_str(sdl)
685	struct sockaddr_dl *sdl;
686{
687	static char ebuf[32];
688	u_char *cp;
689
690	if (sdl->sdl_alen) {
691		cp = (u_char *)LLADDR(sdl);
692		sprintf(ebuf, "%x:%x:%x:%x:%x:%x",
693			cp[0], cp[1], cp[2], cp[3], cp[4], cp[5]);
694	}
695	else {
696		sprintf(ebuf, "(incomplete)");
697	}
698
699	return(ebuf);
700}
701
702int
703ndp_ether_aton(a, n)
704	char *a;
705	u_char *n;
706{
707	int i, o[6];
708
709	i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
710					   &o[3], &o[4], &o[5]);
711	if (i != 6) {
712		fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a);
713		return (1);
714	}
715	for (i=0; i<6; i++)
716		n[i] = o[i];
717	return (0);
718}
719
720void
721usage()
722{
723	printf("usage: ndp hostname\n");
724	printf("       ndp -a[ntl]\n");
725	printf("       ndp [-ntl] -A wait\n");
726	printf("       ndp -c[nt]\n");
727	printf("       ndp -d[nt] hostname\n");
728	printf("       ndp -f[nt] filename\n");
729	printf("       ndp -i interface\n");
730	printf("       ndp -p\n");
731	printf("       ndp -r\n");
732	printf("       ndp -s hostname ether_addr [temp]\n");
733	printf("       ndp -H\n");
734	printf("       ndp -P\n");
735	printf("       ndp -R\n");
736	exit(1);
737}
738
739int
740rtmsg(cmd)
741	int cmd;
742{
743	static int seq;
744	int rlen;
745	register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
746	register char *cp = m_rtmsg.m_space;
747	register int l;
748
749	errno = 0;
750	if (cmd == RTM_DELETE)
751		goto doit;
752	bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
753	rtm->rtm_flags = flags;
754	rtm->rtm_version = RTM_VERSION;
755
756	switch (cmd) {
757	default:
758		fprintf(stderr, "ndp: internal wrong cmd\n");
759		exit(1);
760	case RTM_ADD:
761		rtm->rtm_addrs |= RTA_GATEWAY;
762		rtm->rtm_rmx.rmx_expire = expire_time;
763		rtm->rtm_inits = RTV_EXPIRE;
764		rtm->rtm_flags |= (RTF_HOST | RTF_STATIC);
765		/* FALLTHROUGH */
766	case RTM_GET:
767		rtm->rtm_addrs |= RTA_DST;
768	}
769#define	NEXTADDR(w, s) \
770	if (rtm->rtm_addrs & (w)) { \
771		bcopy((char *)&s, cp, sizeof(s)); cp += sizeof(s);}
772
773	NEXTADDR(RTA_DST, sin_m);
774	NEXTADDR(RTA_GATEWAY, sdl_m);
775	NEXTADDR(RTA_NETMASK, so_mask);
776
777	rtm->rtm_msglen = cp - (char *)&m_rtmsg;
778doit:
779	l = rtm->rtm_msglen;
780	rtm->rtm_seq = ++seq;
781	rtm->rtm_type = cmd;
782	if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
783		if (errno != ESRCH || cmd != RTM_DELETE) {
784			perror("writing to routing socket");
785			return (-1);
786		}
787	}
788	do {
789		l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
790	} while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid));
791	if (l < 0)
792		(void) fprintf(stderr, "ndp: read from routing socket: %s\n",
793		    strerror(errno));
794	return (0);
795}
796
797void
798ifinfo(ifname)
799	char *ifname;
800{
801	struct in6_ndireq nd;
802	int s;
803
804	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
805		perror("ndp: socket");
806		exit(1);
807	}
808	bzero(&nd, sizeof(nd));
809	strcpy(nd.ifname, ifname);
810	if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
811 		perror("ioctl (SIOCGIFINFO_IN6)");
812 		exit(1);
813 	}
814#define	ND nd.ndi
815	printf("linkmtu=%d", ND.linkmtu);
816	printf(", curhlim=%d", ND.chlim);
817	printf(", basereachable=%ds%dms",
818	       ND.basereachable / 1000, ND.basereachable % 1000);
819	printf(", reachable=%ds", ND.reachable);
820	printf(", retrans=%ds%dms\n", ND.retrans / 1000, ND.retrans % 1000);
821#undef ND
822	close(s);
823}
824
825void
826rtrlist()
827{
828	struct in6_drlist dr;
829	int s, i;
830	struct timeval time;
831
832	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
833		perror("ndp: socket");
834		exit(1);
835	}
836	bzero(&dr, sizeof(dr));
837	strcpy(dr.ifname, "lo0"); /* dummy */
838	if (ioctl(s, SIOCGDRLST_IN6, (caddr_t)&dr) < 0) {
839 		perror("ioctl (SIOCGDRLST_IN6)");
840 		exit(1);
841 	}
842#define	DR dr.defrouter[i]
843	for (i = 0 ; DR.if_index && i < PRLSTSIZ ; i++) {
844		struct sockaddr_in6 sin6;
845
846		bzero(&sin6, sizeof(sin6));
847		sin6.sin6_family = AF_INET6;
848		sin6.sin6_len = sizeof(sin6);
849		sin6.sin6_addr = DR.rtaddr;
850		getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, host_buf,
851			    sizeof(host_buf), NULL, 0,
852			    NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
853
854		printf("%s if=%s", host_buf,
855		       if_indextoname(DR.if_index, ifix_buf));
856		printf(", flags=%s%s",
857		       DR.flags & ND_RA_FLAG_MANAGED ? "M" : "",
858		       DR.flags & ND_RA_FLAG_OTHER   ? "O" : "");
859		gettimeofday(&time, 0);
860		if (DR.expire == 0)
861			printf(", expire=Never\n");
862		else
863			printf(", expire=%s\n",
864				sec2str(DR.expire - time.tv_sec));
865	}
866#undef DR
867	close(s);
868}
869
870void
871plist()
872{
873	struct in6_prlist pr;
874	int s, i;
875	struct timeval time;
876
877	gettimeofday(&time, 0);
878
879	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
880		perror("ndp: socket");
881		exit(1);
882	}
883	bzero(&pr, sizeof(pr));
884	strcpy(pr.ifname, "lo0"); /* dummy */
885	if (ioctl(s, SIOCGPRLST_IN6, (caddr_t)&pr) < 0) {
886 		perror("ioctl (SIOCGPRLST_IN6)");
887 		exit(1);
888 	}
889#define	PR pr.prefix[i]
890	for (i = 0; PR.if_index && i < PRLSTSIZ ; i++) {
891		printf("%s/%d if=%s\n",
892		       inet_ntop(AF_INET6, &PR.prefix, ntop_buf,
893				 sizeof(ntop_buf)), PR.prefixlen,
894		       if_indextoname(PR.if_index, ifix_buf));
895		gettimeofday(&time, 0);
896		printf("  flags=%s%s",
897		       PR.raflags.onlink ? "L" : "",
898		       PR.raflags.autonomous ? "A" : "");
899		if (PR.vltime == ND6_INFINITE_LIFETIME)
900			printf(" vltime=infinity");
901		else
902			printf(" vltime=%ld", (long)PR.vltime);
903		if (PR.pltime == ND6_INFINITE_LIFETIME)
904			printf(", pltime=infinity");
905		else
906			printf(", pltime=%ld", (long)PR.pltime);
907		if (PR.expire == 0)
908			printf(", expire=Never\n");
909		else if (PR.expire >= time.tv_sec)
910			printf(", expire=%s\n",
911				sec2str(PR.expire - time.tv_sec));
912		else
913			printf(", expired\n");
914		if (PR.advrtrs) {
915			int j;
916			printf("  advertised by\n");
917			for (j = 0; j < PR.advrtrs; j++) {
918				struct sockaddr_in6 sin6;
919
920				bzero(&sin6, sizeof(sin6));
921				sin6.sin6_family = AF_INET6;
922				sin6.sin6_len = sizeof(sin6);
923				sin6.sin6_addr = PR.advrtr[j];
924				getnameinfo((struct sockaddr *)&sin6,
925					    sin6.sin6_len, host_buf,
926					    sizeof(host_buf), NULL, 0,
927					    NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
928
929				printf("    %s\n", host_buf);
930			}
931			if (PR.advrtrs > DRLSTSIZ)
932				printf("    and %d routers\n",
933				       PR.advrtrs - DRLSTSIZ);
934		}
935		else
936			printf("  No advertising router\n");
937	}
938#undef PR
939	close(s);
940}
941
942void
943pfx_flush()
944{
945	char dummyif[IFNAMSIZ+8];
946	int s;
947
948	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
949		err(1, "socket");
950	strcpy(dummyif, "lo0"); /* dummy */
951	if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0)
952 		err(1, "ioctl(SIOCSPFXFLUSH_IN6)");
953}
954
955void
956rtr_flush()
957{
958	char dummyif[IFNAMSIZ+8];
959	int s;
960
961	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
962		err(1, "socket");
963	strcpy(dummyif, "lo0"); /* dummy */
964	if (ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0)
965 		err(1, "ioctl(SIOCSRTRFLUSH_IN6)");
966}
967
968void
969harmonize_rtr()
970{
971	char dummyif[IFNAMSIZ+8];
972	int s;
973
974	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
975		perror("ndp: socket");
976		exit(1);
977	}
978	strcpy(dummyif, "lo0"); /* dummy */
979	if (ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0) {
980 		perror("ioctl (SIOCSNDFLUSH_IN6)");
981 		exit(1);
982 	}
983}
984
985static char *
986sec2str(total)
987	time_t total;
988{
989	static char result[256];
990	int days, hours, mins, secs;
991	int first = 1;
992	char *p = result;
993
994	days = total / 3600 / 24;
995	hours = (total / 3600) % 24;
996	mins = (total / 60) % 60;
997	secs = total % 60;
998
999	if (days) {
1000		first = 0;
1001		p += sprintf(p, "%dd", days);
1002	}
1003	if (!first || hours) {
1004		first = 0;
1005		p += sprintf(p, "%dh", hours);
1006	}
1007	if (!first || mins) {
1008		first = 0;
1009		p += sprintf(p, "%dm", mins);
1010	}
1011	sprintf(p, "%ds", secs);
1012
1013	return(result);
1014}
1015
1016/*
1017 * Print the timestamp
1018 * from tcpdump/util.c
1019 */
1020static void
1021ts_print(tvp)
1022	const struct timeval *tvp;
1023{
1024	int s;
1025
1026	/* Default */
1027	s = (tvp->tv_sec + thiszone) % 86400;
1028	(void)printf("%02d:%02d:%02d.%06u ",
1029	    s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec);
1030}
1031